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1da177e4 LT |
1 | #include <linux/kernel.h> |
2 | #include <linux/slab.h> | |
1da177e4 | 3 | #include <linux/module.h> |
ae0dadcf | 4 | #include <linux/usb/input.h> |
1da177e4 | 5 | #include <asm/unaligned.h> |
1da177e4 LT |
6 | |
7 | /* | |
8 | * Version Information | |
9 | * v0.0.1 - Original, extremely basic version, 2.4.xx only | |
10 | * v0.0.2 - Updated, works with 2.5.62 and 2.4.20; | |
11 | * - added pressure-threshold modules param code from | |
12 | * Alex Perry <alex.perry@ieee.org> | |
13 | */ | |
14 | ||
15 | #define DRIVER_VERSION "v0.0.2" | |
16 | #define DRIVER_AUTHOR "Josh Myer <josh@joshisanerd.com>" | |
17 | #define DRIVER_DESC "USB KB Gear JamStudio Tablet driver" | |
18 | #define DRIVER_LICENSE "GPL" | |
19 | ||
20 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
21 | MODULE_DESCRIPTION(DRIVER_DESC); | |
22 | MODULE_LICENSE(DRIVER_LICENSE); | |
23 | ||
24 | #define USB_VENDOR_ID_KBGEAR 0x084e | |
25 | ||
26 | static int kb_pressure_click = 0x10; | |
27 | module_param(kb_pressure_click, int, 0); | |
28 | MODULE_PARM_DESC(kb_pressure_click, "pressure threshold for clicks"); | |
29 | ||
30 | struct kbtab { | |
4ee1fc8e | 31 | unsigned char *data; |
1da177e4 | 32 | dma_addr_t data_dma; |
c5b7c7c3 | 33 | struct input_dev *dev; |
ed2b2f2d | 34 | struct usb_interface *intf; |
1da177e4 | 35 | struct urb *irq; |
1da177e4 LT |
36 | char phys[32]; |
37 | }; | |
38 | ||
7d12e780 | 39 | static void kbtab_irq(struct urb *urb) |
1da177e4 LT |
40 | { |
41 | struct kbtab *kbtab = urb->context; | |
42 | unsigned char *data = kbtab->data; | |
c5b7c7c3 | 43 | struct input_dev *dev = kbtab->dev; |
f3192090 | 44 | int pressure; |
1da177e4 LT |
45 | int retval; |
46 | ||
47 | switch (urb->status) { | |
48 | case 0: | |
49 | /* success */ | |
50 | break; | |
51 | case -ECONNRESET: | |
52 | case -ENOENT: | |
53 | case -ESHUTDOWN: | |
54 | /* this urb is terminated, clean up */ | |
ed2b2f2d GKH |
55 | dev_dbg(&kbtab->intf->dev, |
56 | "%s - urb shutting down with status: %d\n", | |
6d0f7dcb | 57 | __func__, urb->status); |
1da177e4 LT |
58 | return; |
59 | default: | |
ed2b2f2d GKH |
60 | dev_dbg(&kbtab->intf->dev, |
61 | "%s - nonzero urb status received: %d\n", | |
6d0f7dcb | 62 | __func__, urb->status); |
1da177e4 LT |
63 | goto exit; |
64 | } | |
65 | ||
1da177e4 LT |
66 | |
67 | input_report_key(dev, BTN_TOOL_PEN, 1); | |
68 | ||
f3192090 DT |
69 | input_report_abs(dev, ABS_X, get_unaligned_le16(&data[1])); |
70 | input_report_abs(dev, ABS_Y, get_unaligned_le16(&data[3])); | |
1da177e4 LT |
71 | |
72 | /*input_report_key(dev, BTN_TOUCH , data[0] & 0x01);*/ | |
73 | input_report_key(dev, BTN_RIGHT, data[0] & 0x02); | |
74 | ||
f3192090 DT |
75 | pressure = data[5]; |
76 | if (kb_pressure_click == -1) | |
77 | input_report_abs(dev, ABS_PRESSURE, pressure); | |
78 | else | |
79 | input_report_key(dev, BTN_LEFT, pressure > kb_pressure_click ? 1 : 0); | |
05f091ab | 80 | |
1da177e4 LT |
81 | input_sync(dev); |
82 | ||
83 | exit: | |
f3192090 | 84 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
1da177e4 | 85 | if (retval) |
ed2b2f2d | 86 | dev_err(&kbtab->intf->dev, |
202712c2 GKH |
87 | "%s - usb_submit_urb failed with result %d\n", |
88 | __func__, retval); | |
1da177e4 LT |
89 | } |
90 | ||
91 | static struct usb_device_id kbtab_ids[] = { | |
92 | { USB_DEVICE(USB_VENDOR_ID_KBGEAR, 0x1001), .driver_info = 0 }, | |
93 | { } | |
94 | }; | |
95 | ||
96 | MODULE_DEVICE_TABLE(usb, kbtab_ids); | |
97 | ||
98 | static int kbtab_open(struct input_dev *dev) | |
99 | { | |
7791bdae | 100 | struct kbtab *kbtab = input_get_drvdata(dev); |
8f7292ed | 101 | struct usb_device *udev = interface_to_usbdev(kbtab->intf); |
1da177e4 | 102 | |
8f7292ed | 103 | kbtab->irq->dev = udev; |
65cde54b | 104 | if (usb_submit_urb(kbtab->irq, GFP_KERNEL)) |
1da177e4 | 105 | return -EIO; |
1da177e4 LT |
106 | |
107 | return 0; | |
108 | } | |
109 | ||
110 | static void kbtab_close(struct input_dev *dev) | |
111 | { | |
7791bdae | 112 | struct kbtab *kbtab = input_get_drvdata(dev); |
1da177e4 | 113 | |
65cde54b | 114 | usb_kill_urb(kbtab->irq); |
1da177e4 LT |
115 | } |
116 | ||
117 | static int kbtab_probe(struct usb_interface *intf, const struct usb_device_id *id) | |
118 | { | |
119 | struct usb_device *dev = interface_to_usbdev(intf); | |
120 | struct usb_endpoint_descriptor *endpoint; | |
121 | struct kbtab *kbtab; | |
c5b7c7c3 | 122 | struct input_dev *input_dev; |
5014186d | 123 | int error = -ENOMEM; |
1da177e4 | 124 | |
c5b7c7c3 DT |
125 | kbtab = kzalloc(sizeof(struct kbtab), GFP_KERNEL); |
126 | input_dev = input_allocate_device(); | |
127 | if (!kbtab || !input_dev) | |
128 | goto fail1; | |
1da177e4 | 129 | |
997ea58e | 130 | kbtab->data = usb_alloc_coherent(dev, 8, GFP_KERNEL, &kbtab->data_dma); |
c5b7c7c3 DT |
131 | if (!kbtab->data) |
132 | goto fail1; | |
1da177e4 LT |
133 | |
134 | kbtab->irq = usb_alloc_urb(0, GFP_KERNEL); | |
c5b7c7c3 DT |
135 | if (!kbtab->irq) |
136 | goto fail2; | |
1da177e4 | 137 | |
ed2b2f2d | 138 | kbtab->intf = intf; |
c5b7c7c3 | 139 | kbtab->dev = input_dev; |
05f091ab | 140 | |
c5b7c7c3 DT |
141 | usb_make_path(dev, kbtab->phys, sizeof(kbtab->phys)); |
142 | strlcat(kbtab->phys, "/input0", sizeof(kbtab->phys)); | |
1da177e4 | 143 | |
c5b7c7c3 DT |
144 | input_dev->name = "KB Gear Tablet"; |
145 | input_dev->phys = kbtab->phys; | |
146 | usb_to_input_id(dev, &input_dev->id); | |
c0f82d57 | 147 | input_dev->dev.parent = &intf->dev; |
7791bdae DT |
148 | |
149 | input_set_drvdata(input_dev, kbtab); | |
1da177e4 | 150 | |
c5b7c7c3 DT |
151 | input_dev->open = kbtab_open; |
152 | input_dev->close = kbtab_close; | |
1da177e4 | 153 | |
f3192090 DT |
154 | input_dev->evbit[0] |= BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); |
155 | input_dev->keybit[BIT_WORD(BTN_LEFT)] |= | |
156 | BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT); | |
157 | input_dev->keybit[BIT_WORD(BTN_DIGI)] |= | |
158 | BIT_MASK(BTN_TOOL_PEN) | BIT_MASK(BTN_TOUCH); | |
c5b7c7c3 | 159 | input_set_abs_params(input_dev, ABS_X, 0, 0x2000, 4, 0); |
19947544 | 160 | input_set_abs_params(input_dev, ABS_Y, 0, 0x1750, 4, 0); |
c5b7c7c3 | 161 | input_set_abs_params(input_dev, ABS_PRESSURE, 0, 0xff, 0, 0); |
1da177e4 LT |
162 | |
163 | endpoint = &intf->cur_altsetting->endpoint[0].desc; | |
164 | ||
165 | usb_fill_int_urb(kbtab->irq, dev, | |
166 | usb_rcvintpipe(dev, endpoint->bEndpointAddress), | |
167 | kbtab->data, 8, | |
168 | kbtab_irq, kbtab, endpoint->bInterval); | |
169 | kbtab->irq->transfer_dma = kbtab->data_dma; | |
170 | kbtab->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
171 | ||
5014186d DT |
172 | error = input_register_device(kbtab->dev); |
173 | if (error) | |
174 | goto fail3; | |
1da177e4 LT |
175 | |
176 | usb_set_intfdata(intf, kbtab); | |
5014186d | 177 | |
1da177e4 | 178 | return 0; |
c5b7c7c3 | 179 | |
5014186d | 180 | fail3: usb_free_urb(kbtab->irq); |
7a9b1492 | 181 | fail2: usb_free_coherent(dev, 8, kbtab->data, kbtab->data_dma); |
5014186d | 182 | fail1: input_free_device(input_dev); |
c5b7c7c3 | 183 | kfree(kbtab); |
5014186d | 184 | return error; |
1da177e4 LT |
185 | } |
186 | ||
187 | static void kbtab_disconnect(struct usb_interface *intf) | |
188 | { | |
c5b7c7c3 | 189 | struct kbtab *kbtab = usb_get_intfdata(intf); |
8f7292ed | 190 | struct usb_device *udev = interface_to_usbdev(intf); |
1da177e4 LT |
191 | |
192 | usb_set_intfdata(intf, NULL); | |
331cb022 DT |
193 | |
194 | input_unregister_device(kbtab->dev); | |
195 | usb_free_urb(kbtab->irq); | |
8f7292ed | 196 | usb_free_coherent(udev, 8, kbtab->data, kbtab->data_dma); |
331cb022 | 197 | kfree(kbtab); |
1da177e4 LT |
198 | } |
199 | ||
200 | static struct usb_driver kbtab_driver = { | |
1da177e4 LT |
201 | .name = "kbtab", |
202 | .probe = kbtab_probe, | |
203 | .disconnect = kbtab_disconnect, | |
204 | .id_table = kbtab_ids, | |
205 | }; | |
206 | ||
08642e7c | 207 | module_usb_driver(kbtab_driver); |